Surname Ricardo Estuardo (Ricardo Estuardo 
) , in the world, is an extremely rare family name. The cognomen Ricardo Estuardo is habitual in Southern Europe, particularly Spain, where it is a very rare surname. More prevalently, Ricardo Estuardo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ricardo Estuardo | Peru, Spain, Ecuador, Guatemala |